added docs

docs/getting-started/installation/README.md

@@ -35,3 +35,5 @@ Or you can use some tools to deploy atm0s-media-server:
 
 - [Kubernetes](./kubernetes.md)
 - [Docker Compose](./docker-compose.md)
+
+About network discovery, please refer to [Network Discovery](./network-discovery.md) for more details with your own use-case.

docs/getting-started/installation/network-discovery.md

@@ -0,0 +1,54 @@
+# Network Discovery
+
+We have two ways to discover other nodes in the network:
+
+- Manually specify the seeds
+- Query the node API
+
+## Manually specify the seeds
+
+Each time we start the node, we can manually specify the seeds.
+
+```
+cargo run -- --sdn-zone-id 0 --sdn-zone-node-id 1 --seeds 1@/ip4/127.0.0.1/udp/10001 media
+```
+
+This way is simple and easy to understand, but it's not flexible and is inconvenient to manage.
+
+## Query the node API
+
+We can use the node API to get the addresses of other nodes and then start the node with those addresses.
+
+```
+cargo run -- --sdn-zone-id 0 --sdn-zone-node-id 1 --seeds-from-node-api "http://localhost:3000/api/node/address" media
+```
+
+This way is flexible and convenient to manage, and we can also use it to dynamically get the addresses of other nodes.
+A common use case is when deploying with docker-compose or kubernetes - we only need to set up the loadbalancer to point to the HTTP API of nodes, then use the API to provide addresses to other nodes.
+
+For example, we might have a loadbalancer config like this:
+
+| Zone | Node Type | Address                          |
+| ---- | --------- | -------------------------------- |
+| 0    | Console   | http://console.atm0s.cloud       |
+| 0    | Gateway   | http://gateway.zone0.atm0s.cloud |
+| 1    | Gateway   | http://gateway.zone1.atm0s.cloud |
+| 2    | Gateway   | http://gateway.zone2.atm0s.cloud |
+
+```
+http://console.atm0s.cloud/api/node/address
+http://gateway.zone1.atm0s.cloud/api/node/address
+http://gateway.zone2.atm0s.cloud/api/node/address
+```
+
+Then we can start nodes with config like this:
+
+| Zone | Node Type | Seeds From API                                    |
+| ---- | --------- | ------------------------------------------------- |
+| 0    | Gateway   | http://console.atm0s.cloud/api/node/address       |
+| 0    | Media     | http://gateway.zone0.atm0s.cloud/api/node/address |
+| 1    | Gateway   | http://console.atm0s.cloud/api/node/address       |
+| 1    | Media     | http://gateway.zone1.atm0s.cloud/api/node/address |
+| 2    | Gateway   | http://console.atm0s.cloud/api/node/address       |
+| 2    | Media     | http://gateway.zone2.atm0s.cloud/api/node/address |
+